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allow time formatting with wchar_t contexts #712

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merged 1 commit into from
Apr 19, 2018
Merged

allow time formatting with wchar_t contexts #712

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25 changes: 18 additions & 7 deletions include/fmt/time.h
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Original file line number Diff line number Diff line change
Expand Up @@ -93,11 +93,21 @@ inline std::tm gmtime(std::time_t time) {
return std::tm();
}

template <>
struct formatter<std::tm> {
namespace internal {
inline std::size_t strftime(char *str, std::size_t count, const char *format, const std::tm *time) {
return std::strftime(str, count, format, time);
}

inline std::size_t strftime(wchar_t *str, std::size_t count, const wchar_t *format, const std::tm *time) {
return std::wcsftime(str, count, format, time);
}
}

template <typename Char>
struct formatter<std::tm, Char> {
template <typename ParseContext>
auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
auto it = internal::null_terminating_iterator<char>(ctx);
auto it = internal::null_terminating_iterator<Char>(ctx);
if (*it == ':')
++it;
auto end = it;
Expand All @@ -110,12 +120,13 @@ struct formatter<std::tm> {
return pointer_from(end);
}

auto format(const std::tm &tm, format_context &ctx) -> decltype(ctx.begin()) {
internal::buffer &buf = internal::get_container(ctx.begin());
template <typename FormatContext>
auto format(const std::tm &tm, FormatContext &ctx) -> decltype(ctx.begin()) {
internal::basic_buffer<Char> &buf = internal::get_container(ctx.begin());
std::size_t start = buf.size();
for (;;) {
std::size_t size = buf.capacity() - start;
std::size_t count = std::strftime(&buf[start], size, &tm_format[0], &tm);
std::size_t count = internal::strftime(&buf[start], size, &tm_format[0], &tm);
if (count != 0) {
buf.resize(start + count);
break;
Expand All @@ -133,7 +144,7 @@ struct formatter<std::tm> {
return ctx.begin();
}

memory_buffer tm_format;
basic_memory_buffer<Char> tm_format;
};
}

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